I've seen lots of coops in books with wire mesh or chicken wire as all or part of the floor on the coop--unless I'm misunderstanding the plans. I can envision the wire mesh, but not the chicken wire. Wouldn't the chicken wire for a floor (to let the droppings fall through to the garden/grass) be awfully hard on their feet? And wouldn't either of those choices (the mesh or the chicken wire) be pretty chilly in winter? Related, I've also seen or heard of a portable tractor run with apparently no bottom. Um...wouldn't that be very easy for predator attacks if the wire mesh doesn't extend down into the ground a foot or so? But if it does go under the ground, then how is it still mobile? Maybe these tractors do have a chicken wire floor as well, but again, wouldn't that be A) hard on their feet, B) inhibit their ability to scratch in the dirt. ??? All these things seem to be so well discussed in books, and yet I still have so many questions.